virtualbox의 네트워크모드는.. 이상해?

virtualbox 4.3.12 버전에서 사용가능한 네트워크는

Not attached

NAT - Network Address Translation

NAT Network

Bridged networking

Internal networking

Host-only networking

Generic networking
7가지인데

인터넷이 되는 설정은 NAT / Bridged networking 뿐이다?
NAT Network 로 설정하면
NAT Network 로 설정한 VM 들 끼리는 통신이 가능하지만
외부로 인터넷 접속이 안된다 -_-

(제대로 된 테스트 필요)

	internet	other VMs
Not attached	x	x
NAT	o	x / DHCP
NAT Network	x	o / DHCP
Bridged networking	o	o (단, 다른 VM도 Bridged)
Internal networking
Host-only networking	x	x

[링크 : https://www.virtualbox.org/manual/ch06.html]
[링크 : https://www.virtualbox.org/manual/ch06.html#network_nat_service] 

 Network Address Translation (NAT) is the simplest way of accessing an external network from a virtual machine. Usually, it does not require any configuration on the host network and guest system. For this reason, it is the default networking mode in VirtualBox.

 The Network Address Translation (NAT) service works in a similar way to a home router, grouping the systems using it into a network and preventing systems outside of this network from directly accessing systems inside it, but letting systems inside communicate with each other and with systems outside using TCP and UDP over IPv4 and IPv6.

 Internal Networking is similar to bridged networking in that the VM can directly communicate with the outside world. However, the "outside world" is limited to other VMs on the same host which connect to the same internal network.

 With bridged networking, VirtualBox uses a device driver on your host system that filters data from your physical network adapter.

 Host-only networking is another networking mode that was added with version 2.2 of VirtualBox. It can be thought of as a hybrid between the bridged and internal networking modes: as with bridged networking, the virtual machines can talk to each other and the host as if they were connected through a physical Ethernet switch.